Error 2147138480 in Set Scan Engine Mode to Actif

Hi all,
I'm fighting in front of this error which occur and does not want to go away (even after trying everything)...
The error (-214713840) is happening when trying to set back the Scan Engine Mode to actif.
It says: "The slave device could not be found. The positional addresses within the LabVIEW project are inconsistent with the actual network topology. [...]"
I was trying to program the detection of the loss of a CompactRIO chassis when this error first occurr.
I have 2 CompactRIO "EtherCAT" connected to a RT computer.
Thanks for all the help or suggestion you can provide me ;-)
Cheers,
Laurent

Hi Laurent,
I don't know if your problem has been solved but I prefer asking.
Are you sure of the error code you encounter ? I don't find it in the manual or other places.
Regards,
Mathieu P. | Certified LabVIEW Associate Developer
National Instruments France
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Journées techniques : des fondamentaux aux dernières technologies pour la mesure et le contrôle/comm...

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CRIO 9068 + Scan Engine Support Error - Even though it is installed on cRIO, after deploying error says its missing

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Cross posted here.
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The error Could not continue scan with nolock due to data movement can occur when you use the NOLOCK table hint, or use the command SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED. That is, so-called dirty reads. The error is not related to the
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All of these effects are transitory and they will not show up when you are alone on the system, only when there is concurrent activity in one or more of the tables in the query.
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If you believe locking to be a problem, you should consider setting the database to READ_COMMITTED_SNAPSHOT
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9236 enable shunt cal property crashes crio OS with scan engine

I would like to inform users of the 9236 Quarter Bridge Strain Gauge Module of a bug. The Real-Time team is aware of this issue and I have been working with an app engineer on it for about a week and he has confirmed my findings. He says the problem is most likely a driver issue or scan engine issue and they are investigating it.
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I have tested this with a few different hardware combinations with both the crio-9014 and crio-9012 controllers, combined with either the 8-channel 9104 back plane or the 4-channel 9102 back plane with the same results. The app engineer was able to duplicate this issue as well.
To duplicate the bug:
Load a crio device with 2009 SP1 or LV2010 and configure the device for scan engine. Locate the 9236 module in the project explorer and drag and drop it into a VI to create the IO variable. Right click the output terminal of the IO Variable and go to create > property > enable shunt calibration on a channel. Once the property is dropped, right click on it and do change to write so that you can write a boolean to the variable. It doesn't matter if you write a true or false to the property, the results are the same. Hit run, watch it crash. When it reboots, hit run again. The crio is now in a state that can only be recovered by physically resetting the device.
I love the crio stuff and I use it every day because it is very reliable and robust. This kind of thing is rare, which is why I am reporting it to the community as well as NI as it is a pretty big bug that took me a while to narrow down.
[will work for kudos]

rex1030,
Shunt calibration can be accessed using a property node. The operation will be the same, you still need to acquire two sets of data and compute the scalar.
You can obtain the necessary reference by dragging the module to the block diagram from the project. Please see http://zone.ni.com/devzone/cda/tut/p/id/9351 for more information on programmatic configuration.
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Sebastian

NI Scan Engine Wont Run

Hello, I am trying to deploy a program on the real time controller of a compactRIO. I decided to use scan mode for now. However, when I try to run my VI I get the following error:
One or more items in this deployment require the NI Scan Engine and corresponding I/O driver(s) to be installed. Go to MAX to install.
If you continue to encounter this conflict, refer to the "Deploying and Running VIs on an RT Target" topic in the LabVIEW Help for information about resolving target deployment conflicts.
I have LabVIEW real time on my machine so I don't know what the reason for this is and I can not find under MAX where to install the scan engine (again I assume it is already installed).
I am using LabVIEW 8.6.1 and the modules I use on my cRIO-9073 are the 9477 DO module and the 9205 AI module. Any help would be appreciated.
Solved!
Go to Solution.

if I tried to install the software software at the NI Max
but it give error
"The selected target does not support this function"
how to fix this error,
what problem with it
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Attachments:
install error.jpg ‏128 KB

Shared Variables, Scan Engine & Multiple Targets

I am seeking some general advice about the structure of my LabVIEW project.
The project consists of a laptop with LabVIEW, and a joystick connected, and a CompactRIO connected via ethernet. I had been running the cRIO in FPGA Interface mode, however a change in some things caused the project to have to be shifted to scan mode.
As of now, the code on the laptop updates shared variables on the cRIO, and reads from shared variables on the cRIO for monitoring. I want the shared variables hosted on the cRIO because it will also need to operate without the laptop connected. Before switching the cRIO to scan mode, I found that I had to first run the laptop code, and then run the cRIO code, or the shared variables would not communicate properly. Now that I have switched to scan mode, I have to run the cRIO code first, and even then the shared vars do not communicate properly for more than a few seconds, and are much laggier.
My ideal project solution is a system that can run with or
without the laptop connected, and obviously not having all these shared
variable issues. I would like to autostart the code on the cRIO, and
have the user run the laptop code if necessary, but in the past this did
not seem to work with the shared variables.
I am really confused about why this is happening. Hopefully I have explained my problem well enough. I don't really want to post the entire project on here, but I can email it to people if they are willing to take a look at it. Thank you for taking the time to read this.
I am running LabVIEW 2010 SP1 with the Real-time, FPGA, DSC, and Robotics modules. I have the Feb '11 driver set and NI-RIO 3.6.0 installed and all completed updated on my RT cRIO.
Solved!
Go to Solution.

I do this type of stuff all the time...
Move all your NSV libraries to the cRIO. From the project you must deploy to the cRIO and from then on they are persistant until you reformat.
From your windows HMI app, you can place static NSV tags on the block diagram or use the dynamic SV API to R/W. Also you can bind HMI controls and
indicators directly to cRIO NSV's (This is what I do) Also I create a 'mirror' library in the PC HMI that is bound to the cRIO library. This library has DSC Citadel
data logging enable and will automatically save historical traces of all my important data - very nice. PC hosted libraries can be set to autodeploy in the app build.
also the project has a autodeploy option for the Development Environment which I normally turn off. If you have PC to cRIO binding setup then you need to be cautious
about any sort of autodeployment since it will potentially force the cRIO app to stop when you deploy. To get around this, you can use PSP binding (IP address rather than project
process name) and use the DSC deploy library vi's in your HMI app. Once you are using the scan engine you can use the DSM (Distributed System Manager) app to view, proble and
chart all of you IOV and NSV's on your network.

Scan interface mode erreur -805

Bonjour,
Je suis débutant de système Compact RIO. J'ai quelques questions sur le scan interface mode.
Le matériel que j'utilise est
le contrôleur cRIO-9012 et chassis cRIO-9101 intégré
une carte AI 9205
une carte DIO 9401
Je voudrais utiliser le scan interface mode pour comprendre le fonctionnement des cartes, dans le FPGA interface mode, ça prend du temps pour la compilation.
Le chassis ne supporte pas le scan interface mode, alors je configure les 2 cartes individuellement en utilisant les I/O variables. Ensuite je crée un VI tout simple pour lire la tension de la carte AI. J'obtient une erreur -805 : Timing source ,synchroniser avec le moteur de balayage.
J'ai vérifié aussi dans MAX, le soft NI scan Engine est bien installé.
Quelqu'un pourrait me dire d'où vient ce problème?
Merci d'avance.
Lily
Solved!
Go to Solution.
Attachments:
scan interface mode.zip ‏22 KB

Bonjour,
Erreur -805
est relatée à un bug dans la version localisée de LabVIEW.
LabVIEW Stops Execution After Synchronizing With Scan Engine :
http://digital.ni.com/public.nsf/allkb/81977F8BE192C7C48625754C0075D93E?OpenDocument
Erreur
-66205 peut être un résultat de l'erreur précédente, mais aussi parce que les
variables partagées ne sont pas déployées (correctement).
Comme expliquer dans l'article proposer par « speleato »
(http://digital.ni.com/public.nsf/allkb/122E971F52FD081A86257500007A046C), vous
devez compiler et exécuter le « Blanc VI » du FPGA enfin the déployée la
logique nécessaires pour le « scan mode », utilisant la fonction « Open
FPGA VI Reference » dans le « test 9205.vi ».
Le moment
que la logique est déployée, l'erreur doit être disparue.
ENGLISH :
Error -805 is related to a bug in the localized versions of
LabVIEW.
LabVIEW Stops Execution After Synchronizing With Scan Engine :
http://digital.ni.com/public.nsf/allkb/81977F8BE192C7C48625754C0075D93E?OpenDocument
Error -66205 can be a result of the previous error, but more
likely it is because the shared variables are not deployed (correctly).
As explained in the article refered by « speleato » (http://digital.ni.com/public.nsf/allkb/122E971F52FD081A86257500007A046C),
you need to compile and execute the « blanc VI » on the FPGA target
to deploy the needed « scan mode » logic, using the "Open FPGA VI
Refernce" function in the "test 9205.vi".
Once this is done, the error should have been gone.
Best regards,
Joeri
National Instruments
Applications Engineering
http://www.ni.com/ask
Make our forums great:
If you like the answer, don't forget to "Kudos!".
"Accept the Solution" if your question is answered!

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Optimizing EtherCAT Performance when using Scan Engine

Hello everyone,
This week I have been researching and learning about the limitations of the LabVIEW's Scan Engine. Our system is an EtherCAT (cRIO 9074) with two slaves (NI 9144). We have four 9235s, two 9237s and two 9239 modules per chassis. That means we have a total of 144 channels. I have read that a conservative estimation for each scan is 10 usec. This means with our set up, assuming we only scan it would take 1.44 msec which would yield roughly a rate of 694 Hz. I know that when using a shared variable, the biggest bottle neck is transmitting the data. For instance, if you scan at 100 Hz, it'll be difficult to transmit that quickly, so it's best to send packets of scans (which you can see in my code).
With all of that said, I'm having difficulties scanning any faster than 125 Hz without railing out my CPU. I can record at 125 Hz at 96% of the CPU usage but if I go down to 100 Hz, I'm at 80%. I noticed that the biggest factor of performance comes when I change my top loop's, the scan loop, period. Scanning every period is much much more demanding than every other. I have also adjusted the scan period on the EtherCAT's preferences and I have the same performance issues. I have also tried varying the transmission frequency(bottom loop), and this doesn't affect the performance at all.
Basically, I have a few questions:
1. What frequency can I reasonably expect to obtain from the EtherCAT system using the Scan Engine with 144 channels?
2. What percent of the CPU should be used when running a program (just because it can do 100%, I know you shouldn't go for the max. Is 80% appropriate? Is 90% too high?)
3.Could you look through my code and see if I have any huge issues? Does my transmission loop need to be a timed structure? I know that it's not as important to transmit as it is to scan, so if the queue doesn't get sent, it's not a big deal. This is my first time dealing with a real time system, so I wouldn't be surprised if that was the case.
I have looked through almost every guide I could find on using the scan engine and programming the cRIO (that's how I learned the importance of synchronizing the timing to the scan engine and other useful facts) and haven't really found a definitive answer. I would appreciate any help on this subject.
P.S. I attached my scan/transmit loop, the host program and the VI where I get all of the shared variables (I use the same one three times to prevent 144 shared variables from being on the screen at the same time).
Thanks,
Seth
Attachments:
target - multi rate - variables - fileIO.vi ‏61 KB
Get Strain Values.vi ‏24 KB
Chasis 1 (Master).vi ‏85 KB

Hi,
It looks like you are using a 9074 chassis and two 9144 chassis, all three full with Modules and you are trying to read all the IO channels in one scan?
First of all, if you set your scan engine speed for the controller (9074), then you have to synchronize your Timed Loop to the Scan Engine and not to use a different timebase as you do in your scan VI.
Second the best performance can be achieved with I/O variables, not shared variables and you should make sure to not allocate memory in your timed Loop. memory will be allocated if an input of a variable is not connected, like the error cluster for example or if you create Arrays from scratch as you do in your scan VI.
If you resolve all these Issues you can time the code inside your Loop to see how long it really takes and adjust your scan time accordingly. The 9074 does not have that much power so you should not expect us timing. 500 Hz is probably a good estimate for the max. Performance for 144 channels and depending on how much time the additional microstrain calculation takes.
The ECAT driver brings examples which show how to program these kinds of Apps. Another way of avoiding the variables would be the programmatic approach using the variable API.
DirkW

Open data set from Text mode to Binary mode

Hello All,
In a program i am using the command
    OPEN DATASET file FOR OUTPUT IN TEXT MODE
    ENCODING NON-UNICODE IGNORING CONVERSION ERRORS.
Now i want to change this open data set to binary mode. I mean to change the command like below.
OPEN DATASET file FOR OUTPUT IN BINARY MODE.
when i do this. the output in the file is totally changing. I mean previously i have some text now i have some diffrent characters.
How can i use this command with out change in the output as previous output. Please tell me the changes and why i have to do.
OPEN DATASET file FOR OUTPUT IN BINARY MODE.
Regards,
Lisa.
Message was edited by:
        Lisa Roy

Text Mode means that the records in the file have a carriage return marking the end of each record.
Binary Mode means the file is a string of data.
You can't read a text file in BINARY MODE, or a binary file in TEXT MODE.
If you are changing the mode, then you must be supplied with a file in the new mode.

How can I change the daq setting to differential mode in my labview program (example)?

I would appreciate if I could get an example in Labview 5.1. I realized that I need to create a cluster but for some reason it would not work

Examples for data acquisition are in the LabVIEW >> Examples >> Daq >> anlogin >> anlogin.llb directory. You will still have to do the following to programmatically set the measurement mode to differential.
You can set your data acquisition with the AI Config.vi in LabVIEW. There is an input for "coupling and input config". A good trick to make sure that you create the cluster correctly is to use your mouse as the wiring tool and right-click over that input. Then, choose Create Control or Create Constant. The cluster will pop up, and you can use your operating tool to choose differential mode for the second pull-down ring in the cluster.
Geneva L.
Applications Engineering
National Instruments
http://www.ni.com/ask

Error 2147138480 in Set Scan Engine Mode to Actif

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